Mikey Arce

The Storefront Hooks Customizer gives you the ability to add content to Storefront’s template hooks through the WordPress Customizer.
This plugin only works with Storefront and Storefront Child Themes
You will be able to add content into the Header, Content, Homepage Template, and Footer sections of the Storefront theme.
Each hook is saved on a per-theme basis, so when you switch themes the options will be blank. If you switch back, you will see the options added back.

Storefront Hooks Cutomizer

Hook into Storefront from the Customizer!

Automattic

WooCommerce

WooThemes

James Koster

A simple plugin that adds a full width widget region above the default, columnised Storefront footer widget area. Customise the display by adding a background image and tweaking colors via the Customizer.
This plugin requires the Storefront theme to be installed.

Storefront Footer Bar

Add a full width widgetised region above the default Storefront footer widget area.

Storefront Hooks Cutomizer vs Storefront Footer Bar